Troweling mechanism.



Patented May 29, 1917.

3 SHEETS-SHEET 1.

INVQVTOR I]; 1 E HFULIDFN K9: 444M ATTORNEY F. H FOLDEN.

TROWELING MECHANISM.

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UNITED STATES PATENT OFFIGE.

FRANK H. FOLDER, OF DES MOINES, IOWA, ASSIGNOR T0 MONARGH MANUFACTURINGconronn'rromior ooms, rown, aoonrona'rroiv'or IOWA.

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To all whom it may concern:

Be it known thatLjFimnxI-I. FOLDEN, .a citizen of the UnitedStates, andaresident of Des Moines, in the'.county of Folk and State of Iowa, haveinvented certain new and useful Improvements in Troweling Mechanism, ofwhich the following is a specification.

The resent invention relates to machines for mo ding concrete or otherplastic material.

The invention has for its primary object the production of improvedmechanism for automatically troweling plastic forms cast in molds.

A further object of the invention is the production in a machine forcasting plastic forms, of mechanism including a poweractuatedreciprocating carriage to trowel the cast forms.

Still a further object of the invention is the production in mechanismof this class of improved power-transmission and controlling meanstherefor.

The invention further contemplates an automatic troweling mechanismsimple and inexpensive in production and highly eflicient in operation.

With these and other objects in view, the

invention, consisting in the construction," combination and novelarrangements of.

arts, will be fully understood from; the fol-i owing description,reference being had to the accompanyin drawings, which form a part ofthis app ication, and in which like characters of reference indicatecorresponding parts throughout the several views, of

Figure 1 is an inside elevation of a machine constructed in accordancewith the invention, parts being cut away;

Fig. 2 1s a fragmentary side elevation of thejsame, Y

Fig. 3is a horizontal section, taken on the line 3-3, of Fig. 2;

Fig. 4 is an inverted plan of the carriage and parts associatedtherewith;

Fig. 5 is'a transverse section of the same, taken on the line 55, Fig.3;

Specification of Letters Yatent.

Patented May 29,1917.

Application filed September 16, 1916. Serial N o."120,450.

Fig. 6 is an enlarged side elevation of the laterably' movable bearingof the carriage "driveshaft, and i V Fig. 7 isf'a front elevation of thesame.

Although I have illustrated and hereinafter described the preferredembodiment of the invention, I would not be understood as being limitedto the specific structure chosen for illustration for it will beapparent that the various alterations and modifications may be madewithout departing from the spirit and scope of the invention as definedinthe appended claims.

Referring now, to the illustrations, 8, represents the main frame, whichmay be of any suitable form.

On thelmain frame is mounted a driveshaft, ,9, actuated by anypreferredsource j of power and carrying a sprocket-wheel, 10,

connected by a sprocket-chain, 11, with a relatively large sprocketwheel, 12, mounted on a, short shaft, 13, journaled in a suitablebearing, 14, mounted on a cross-member, 15, on the main frame.

The shaft, 13, carries a bevel-gear, 16, intermeshed with abevel-pinion, 17, mounted on an upright shaft, 18, rotatably supportedby the arms of a yoke,.19, the bow of which is freely mountedon theshaft, 13, intervmediate the sprocket-wheel, 12, and gear, 16.

From the main-frame depend bars, 20,

horizontal arms, 21, on the side of one of which issecured a bracket,22, carrying a horizontal bar, 23, provided with rack teeth on its underside.

On theunder sides of the arms are mounted bearings, 24, which slidablysupport parallel rods, 25, disposed in parallelism with the rack, 23,and interconnected at their ends by cross-members, 26, carrying oppoa,sprocket-wheel 31, connected by a sprocket chain, 32, with asprocket-wheel 33, carried .the lower ends of which are provided with bya shaft, 34, journaled in suitable bearings, 35, mounted below theforward ends of the racks, 27

Intermediate the bearings, 35, the shaft, 34, carries a roller 37.

The lower end of'the upright shaft, 18, carries a pinion, 38, engageableWith either of the racks, 27 and controlled by a laterally movablebearing, preferably comprising a yoke, 39, the arms of which, freelyinclose the shaft, 18, and the web of which is formed with a collar, 40,encircling an eccentric, 41, carried by a short shaft, 42, journaled ina bearing, 43, mounted on a cross-member, 44, secured to the supportingarms, 21. The shaft, 42, carries a sprocket- Wheel, 45, connected by asprocket-chain, 46, with a sprocket-wheel, 47, mounted on a shaft, 48,journaled for rotation in one of the supports, 20, and provided with acrank, 49.

In operation, the mold, 50, (shown in Fig. 1), is so positioned withrespect to the carriage, that the roller, 37, will trowel thesuperfluous material from the top of the mold, as the carriagereciprocates.

It is evident that the shaft, 13, drives the upright shaft, and thepinion, 38, constantly, while the machine 1s in operation.

At opposite ends, the racks, 27 are mutilated or blank, as at 51, tocause automatic disengagement of the racks and the pinion at the ends ofthe stroke of the carriage. When the carriage reaches the end of itsstroke, operation of the crank, 49, causes the eccentric to coact withthe collar, 40, to shift the pinion into engagement with the oppositerack to reciprocate the carriage and roller.

It will be observed that the roller is rotated oppositely to itsdirection of travel, thereby smoothly troweling the forms and forcingthe superfluous material ahead of it.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent, is

1. In a mechanism for troweling forms of plastic material, a supportingframe, an upright rotatable laterally-movable shaft, a carriagesupported by the frame to re ciprocate horizontally, and includingoppositely-disposed parallel racks positioned on opposite sides of theshaft, a troweling element carried by the carrige, a pinion mounted onthe shaft, and means for shifting the shaft laterally to place thepinion in engagement with either rack.

2. In mechanism for troweling forms of plastic material, a supportingframe, an upright rotatable laterally-movable shaft, a carriagesupported by the frame to reciprocate horizontally, and includingoppositely-disposed parallel racks positioned on opposite sides of theshaft, a pinion on the shaft, means for shifting the shaft laterally toplace the pinion alternately in engagement with the racks to reciprocatethe carriage, a roller carried by the carriage to trowel the forms andmeans actuated by reciprocation of the carriage for rotating the roller.

3. In mechanism for troweling forms of plastic material, a supportingframe, an upright rotatable laterally-movable shaft, a carriagesupported by the frame to reciprocate horizontally, and includingoppositely-disposed parallel racks positioned on opposite sides of theshaft, a pinion on the shaft, means for shifting the shaft laterally toplace the pinion alternately in engagement With the racks to reciprocatethe carriage, a roller carried by the carriage to trowel the forms andmeans actuated by reciprocation of the carriage for rotating the rolleroppositely to its direction of travel.

I 4.. In mechanism for troweling forms of plastic material, a supportingframe, an upright rotatable laterally-movable shaft, a carriagesupported by the frame to reciprocate horizontally, and includingoppositely disposed racks positioned on opposite sides of the shaft, apinion on the shaft, means for shifting the shaft laterally to place thepinion alternately in engagement with the racks, said means including alaterally movable bearing on the shaft and having a collar atright-angles to the shaft, and a rotatable shaft having an eccentricencircled by the collar, and a troweling element carried by thecarriage.

5. In mechanism for troweling forms of plastic material, a supportingframe, a horizontal reciprocating carriage supported thereby, atroweling roller carried by the carriage, and means for rotating theroller oppositely to its direction of travel, including a rack securedto the frame, a pinion engaged by the rack and mounted on the carriage,sprocket-wheels mounted coaxially With the pinion and roller, and achain connecting the sprocket-wheels.

6. In mechanism for troweling forms of plastic material, a supportingframe having a horizontal rotating shaft provided with a bevel-gear, ayoke having its bow pivoted on the shaft, a shaft depending rotatablythrough the arms of the yoke, a bevel-gear on the latter shaft,intermediate the arms of the yoke and intermeshed with said "first 7. Inmechanism for troweling forms of plastic material, a supporting frame,an upright, rotatable, laterally-movable shaft, arms depending from theframe, a horizontally-reciprocating troweling carriage includingparallel rods, slidably supported by the arms, and parallelinterconnected oppositely-disposed racks positioned on opposite sides ofthe shaft and in parallelism With and secured to the rods, a pinion 10mounted on the shaft and engageable with the racks, and means for movingthe shaft laterally to place the pinion alternately in engagement withthe racks.

In testimony, whereof, I have hereunto 15 set my hand this 7th day ofSept, 1916.

FRANK H; FOLDEN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, I). G.

